Simplify code in CPDFSDK_FormFillEnvironment.

This makes various IsFooKeyDown() methods static.
Transitively apply that to callers too.

Change-Id: Ia43b1fd62889c1943e0d8407e9696225b05125a8
Reviewed-on: https://pdfium-review.googlesource.com/7190
Commit-Queue: Lei Zhang <thestig@chromium.org>
Reviewed-by: dsinclair <dsinclair@chromium.org>
Reviewed-by: Tom Sepez <tsepez@chromium.org>
diff --git a/fpdfsdk/cpdfsdk_interform.cpp b/fpdfsdk/cpdfsdk_interform.cpp
index ebbe02c..9ae2aa4 100644
--- a/fpdfsdk/cpdfsdk_interform.cpp
+++ b/fpdfsdk/cpdfsdk_interform.cpp
@@ -347,8 +347,8 @@
 
   CPDFSDK_ActionHandler* pActionHandler = m_pFormFillEnv->GetActionHandler();
   PDFSDK_FieldAction fa;
-  fa.bModifier = m_pFormFillEnv->IsCTRLKeyDown(0);
-  fa.bShift = m_pFormFillEnv->IsSHIFTKeyDown(0);
+  fa.bModifier = false;
+  fa.bShift = false;
   fa.sValue = csValue;
   pActionHandler->DoAction_FieldJavaScript(
       action, CPDF_AAction::KeyStroke, m_pFormFillEnv.Get(), pFormField, fa);
@@ -367,8 +367,8 @@
 
   CPDFSDK_ActionHandler* pActionHandler = m_pFormFillEnv->GetActionHandler();
   PDFSDK_FieldAction fa;
-  fa.bModifier = m_pFormFillEnv->IsCTRLKeyDown(0);
-  fa.bShift = m_pFormFillEnv->IsSHIFTKeyDown(0);
+  fa.bModifier = false;
+  fa.bShift = false;
   fa.sValue = csValue;
   pActionHandler->DoAction_FieldJavaScript(
       action, CPDF_AAction::Validate, m_pFormFillEnv.Get(), pFormField, fa);